ssl_support.py 文件源码

def find_ca_bundle():
    """Return an existing CA bundle path, or None"""
    if os.name=='nt':
        return get_win_certfile()
    else:
        for cert_path in cert_paths:
            if os.path.isfile(cert_path):
                return cert_path
    try:
        return pkg_resources.resource_filename('certifi', 'cacert.pem')
    except (ImportError, ResolutionError, ExtractionError):
        return None